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THz characterization of GeSn monocrystalline thin films
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Liu, Xinyun, Giunto, Andrea, Hutchinson, Jake, Humblot, Nicolas, Damry, Djamshid, Milot, Rebecca L., Morral, Anna Fontcuberta i and Boland, Jessica (2022) THz characterization of GeSn monocrystalline thin films. In: 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Delft, Netherlands, 28 Aug - 02 Sep 2022. Published in: 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) ISBN 9781728194271. doi:10.1109/irmmw-thz50927.2022.9895959 ISSN 2162-2035.
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Official URL: https://doi.org/10.1109/IRMMW-THz50927.2022.989595...
Abstract
The employment of other group IV materials, such as alloys of germanium and tin, poses a solution for overcoming the efficiency limit of silicon that arises from its indirect bandgap. By using THz spectroscopy, the optoelectronic properties, such as conductivity, mobility, carrier lifetime, can be extracted non-invasively, since there is no electrical contact. In this work, we use optical pump-THz probe (OPTP) spectroscopy to examine the photoconductivity lifetime and mobility of GeSn alloy thin film samples with different Sn concentration. The results demonstrate photoconductivity lifetimes on nanosecond timescales and carrier mobilities in range of 40~210cm 2 /(Vs), highlighting the promise of these thin films in device applications.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| SWORD Depositor: | Library Publications Router | ||||
| Journal or Publication Title: | 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) | ||||
| Publisher: | IEEE | ||||
| ISBN: | 9781728194271 | ||||
| ISSN: | 2162-2035 | ||||
| Official Date: | 28 August 2022 | ||||
| Dates: |
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| DOI: | 10.1109/irmmw-thz50927.2022.9895959 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Delft, Netherlands | ||||
| Date(s) of Event: | 28 Aug - 02 Sep 2022 |
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